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For the first time, rolex is delivering a watch on a rubber strap – except in classic rolex fashion it's not a rubber strap at all. it's a beautifully over-engineered bracelet called the oysterflex..

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There is big news, and there is Rolex big news, and in some ways, ne'er the twain shall meet. At Baselworld this year, Rolex debuted a first for the company: the very first, ever, Rolex delivered on a rubber strap. Now, for most companies this would have little effect on watch enthusiasts other than to evoke (very) tepid interest at best, and boredom at worst – but this is not an ordinary rubber strap, this is an official, designed-and-tested-and-thoroughly-obsessed-over-by-Rolex rubber strap. And thereby hangs a tale.

The Yachtmaster, as we have mentioned in some of our previous coverage , occupies a somewhat particular place in Rolex’s lineup of sports watches; it shares water-resistance and a turning bezel with the Submariner (the latter is water resistant to 300 m while the Yachtmaster standard model is water resistant to 100 m). It is certainly not a tool watch; the Yachtmaster is offered in either platinum and steel, or gold and steel (that’s Rolesium and Rolesor, lest we forget) and is either quietly or unequivocally luxurious depending on what size and metal you go for (Rolex makes the Yachtmaster in both 35 mm and 40 mm sizes). 

The Yachtmaster’s history goes back to the first introduction of the watch in 1992, although the name, interestingly enough, appears on the dial of a prototype Yachtmaster Chronograph from the late 1960s (a watch so legendary I am actually forced to use the word; one of three known is in the collection of Mr. John Goldberger; we covered it – and a host of other remarkable ultra-rare watches from his collection – in a very memorable episode of Talking Watches ).

The term “Yachtmaster” is also, incidentally, used for a certificate of competency in yachting which is issued by the Royal Yachting Association, although we’re unaware of any specific association between the RYA and the Yachtmaster watch.

Now, this newest version of the Yachtmaster does take a few pages from the existing Yachtmaster playbook: 100-meter water resistance, a bidirectional turning bezel, and a dial and hands that echo the Submariner. There are also a couple of features that may make vintage Sub enthusiasts wonder if Rolex mightn’t have an exceedingly subtle sense of humor; the gilt coronet and “Rolex,” and the red lettering, both features which according to HODINKEE founder Ben Clymer would have, had they appeared on a Rolex dive watch, made it instantly the single most popular watch in the modern Rolex inventory. The case is rose gold – Rolex famously makes their own, called Everose, in their own foundry, with a bit of platinum mixed in to prevent discoloration – and the bezel, rather than being some other precious metal (as is the case in the “standard” Yachtmasters) is in black Cerachrom – a very technical-looking matte black that contrasts sharply with the gold case. Somehow, between the rose gold, the Cerachrom bezel, and the new Oysterflex bracelet this manages to be the most luxurious and at the same time most technical Yachtmaster yet (leaving aside the Yachtmaster II, which we recently reviewed right here , but that is a watch that marches to the beat of a different drummer entirely).

The two different versions of the Everose Yachtmaster (40 mm and 37 mm) sport different movements; the larger uses the caliber 3135 and the smaller, the newer 2236, which sports the “Syloxi” silicon balance spring (first used by Rolex in 2014).

The Oysterflex bracelet is, in a nutshell, quite a piece of work. One of the most endearing traits of Rolex as a company is that it tends to demonstrate what we can only describe as a laudable degree of corporate obsessive-compulsive disorder when it comes to research and development, and it does so, often, without making any sort of fanfare about it at all. In this case we do know a little bit about the Oysterflex, however – it is basically designed to have the hypoallergenic and comfort properties of a rubber strap and the durability and shape-retention properties of a bracelet. 

At the core of the Oysterflex bracelet are metal inserts made of titanium and nickel, which are used to affix the bracelet to the clasp and watch case; over those is a sheathing of “high-performance black elastomer.” “Elastomer” is a portmanteau word, formed from “elastic” and “polymer” and is a general term for natural and synthetic rubbers. In addition to the materials complexity of the Oysterflex bracelet, it is also shaped in a rather unusual fashion – there are ridges molded into the the wristward face of the bracelet, which are intended to allow the bracelet when worn to better approximate the natural curvature of the wrist.

They might look a bit odd but in practice, the design works out quite wonderfully; this is easily the most downright comfortable and organic-feeling rubber strap I have ever worn, and like the entire watch manages to be both extremely technical in feel, and very luxurious at the same time; I doubt whether any company has ever taken so much trouble over the design of a strap (for all that Rolex prefers the term “bracelet” in describing the Oysterflex, habit dies hard and you’ll probably find yourself calling it a strap, just as we did). On the wrist, the two stabilizing ridges do exactly what they are supposed to: keep the watch from shifting, as heavier watches on rubber straps are wont to do, without requiring you to have the strap uncomfortably tight. The Everose Oysterlock clasp does a superb job mechanically and also looks fabulous into the bargain; the quality of finish on the clasp and case may not seem terribly elaborate at first, but it is as technically flawless as anything I have ever seen at any price, on any watch.

What we have here, in other words, is a very Rolex interpretation of luxury. Yes, this is a gold watch, and a gold Rolex, and wearing a gold Rolex always carries with it, shall we say, certain semiotic complexities. However there is also another side to the watch, and to the Rolex approach to luxury in general: the taking of such pains to produce technical perfection that technical perfection becomes a luxury in itself.

The Everose Rolex Yachtmaster, in Rolex Everose, with Everose Oysterclasp and Oysterflex bracelet, as shown, $22,000 in 37 mm, and $24,950 in 40 mm. For more info, check out Rolex.com.

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Yacht-Master II

Created for competition

The Yacht-Master II is the only chronograph in the world featuring a programmable countdown with a mechanical memory. An essential tool for skippers to gauge their best course of action.

Ring Command system

Rolex achieved perfection when it turned its attention to redefining the purpose and functionality of the bezel. Typically, a bezel operates independently from the internal mechanism; however, the Ring Command bezel in the Yacht-Master II regatta chronograph operates in conjunction with it.

As a mechanical component linked to the movement, the bezel literally acts as the key to the programmable countdown, allowing it to be set and synchronised to the sequence of race start times. Complex in design, but simple in use, it is functionally beautiful.

The countdown’s sophisticated functions were designed to be easily set and operated. The preliminary programming of up to 10 minutes is accessed, and then locked, via the rotatable bezel thanks to Ring Command, a patented system of interaction between the bezel, the winding crown and the movement, developed by Rolex. A technical feat made possible by the brand’s in-house mastery of the entire watch design and manufacturing process, from the case to the movement.

A distinctive aesthetic

The Yacht-Master II’s countdown can be programmed for a duration of between 1 and 10 minutes. The programming is memorized by the mechanism so that at a reset it returns to the previous setting. Once launched, the countdown can be synchronized on the fly to match the official race countdown.

On the right-hand side of the middle case, the Yacht-Master II sports two countdown pushers, specially designed to suggest winches, the manual winding gear on a sail boat. The Yacht-Master II is always fitted on an Oyster bracelet with a Oysterlock safety clasp, equipped with an Easylink comfort extension link.

The Yacht-Master II measures 44 mm in diameter, its large size contributing to the optimal legibility of the dial in all conditions.

Cerachrom bezel insert

The blue monobloc Cerachrom bezel insert of the Yacht-Master II is made of an extremely hard, virtually scratchproof ceramic whose colour is unaffected by ultraviolet rays, seawater or water that is chlorinated. In addition, thanks to its chemical composition, the high-tech ceramic is inert and cannot corrode. The numerals and inscriptions are moulded in the ceramic and coloured with gold or platinum using a PVD (Physical Vapour Deposition) process.

Oyster bracelet

The Oyster bracelet is a perfect alchemy of form and function, aesthetics and technology, designed to be both robust and comfortable. It is equipped with an Oysterlock folding clasp, which prevents accidental opening and the Easylink comfort extension link, also exclusive to Rolex. This ingenious system allows the wearer to increase the bracelet length by approximately 5 mm, providing additional comfort in any circumstance.

Complex in design, but simple in use, the Ring Command bezel is functionally beautiful.

Calibre 4161 Superlative movement

The Yacht-Master II is equipped with calibre 4161, a self-winding mechanical chronograph movement entirely developed and manufactured by Rolex. Its architecture, manufacturing quality and innovative features make it exceptionally precise and reliable. This abundance of Rolex technology includes a patented function – a programmable countdown with a mechanical memory – and comprises some 360 components. Some of them are made by UV-LiGA, a micromanufacturing technology entirely mastered in-house by Rolex.

Shop New Arrivals

Rolex Yacht-Master 40 Ultimate Buying Guide

If you could buy a Rolex watch for yourself, which would it be? We guess most people would have a long list. However, most people wouldn’t think to choose the Rolex Yacht-Master 40 – a hidden jewel in the Rolex professional line up in a 40mm stainless steel case.

To take you back in time, Rolex Yacht-Master (YM) was in development for a while. It’s regarded as one of the most demanding watches produced by Rolex and took several years to finish. Its concept was born as early as the mid-1960s, but it wasn’t until the 1990’s that the model was officially released to the market.

With its updated styling and re-engineered mechanical movements, the Rolex Yacht-Master 40 is a unique watch that straddles style and luxury at a comparatively lower price. Below, we’ll discuss the Rolex Yacht-Master 40, and provide expert tips when buying the watch.

Rolex Yacht-Master 40: An Ultra-Modern Design

A line up of the Oyster Perpetual family, Rolex Yacht master 40 collection is a series of watches with a unique design built to withstand the elements. It was originally designed for diving enthusiasts but is refined enough to fit the daily wearer.

The Yacht-Master 40 was first introduced in the 90s. Since then, it has undergone several upgrades. One of the first products of the YM line is the ref. 16628 in 18k yellow gold. In 1999, amidst the Y2K bug, the brand introduced another line in caliber 3135 movement – the ref. 16622. Instead of an 18k yellow gold, the watch boasts stainless steel material with a platinum bezel. Back then, the watch model was touted as the “celebrity favorite” as Phil Collins, Bruce Willis, and other personalities were spotted wearing it.

Fast forward to 2012, the ref. 116622 was born. It still had the platinum dial but with some distinctive configuration, such as the shimmering effect and a glittering finish. Finally, the 126622 joined the Rolex catalog in 2019. The best thing about this watch is that it offers an Oysterflex bracelet option that allows for increased flexibility without sacrificing comfort or style.

With its evolution, the Rolex Yacht Master 40 is a stunning watch with an elegant and stylish design, perfect for any occasion. Above all, it has all of the features you would expect from a luxury watch brand like Rolex:

• The 40 mm Oyster case exemplifies solid craftsmanship and elegance.
• It comes with a sapphire crystal that protects its face from scratches.
• The model also features an automatic movement with a date display at 3 o’clock on the dial.
• The bezel is made of ceramic and titanium, which makes it incredibly strong and durable.
• Rolex Yacht-Master 40 watch comes with an Oyster Steel bracelet that is resistant to rust and corrosion.
• With a folding Oysterlock safety clasp, you can easily put on or remove it without worrying about it falling off.
• As the name implies, this watch is popular with yachtsmen because it has high water resistance and a rotating bezel.

Reasons To Buy a Rolex Yacht-Master 40

As a successful person, we know you’ll choose to grab a Rolex – specifically a YM 40 model due to its bolder look. Beyond that, there are several reasons to buy a YM 40 watch.

Signifies Status & Success

The Rolex Yacht Master 40 is a watch that says quite a bit about its wearer. Whenever you have it on your wrist, it simply shouts, “You’ve made it!” Created to stand the test of time, it represents the pinnacle of exquisite watchmaking. It’s an icon of success, power, and prestige.

No matter what you do or where you go, this watch will serve as a reminder of your accomplishments. You worked hard to get where you are. It’s time to enjoy the fruits of your labor by treating yourself to one of the Yacht-Master 40 series.

Functionality

Rolex Yacht-Master 40 has always been the symbol of precision and excellent performance, thanks to its Chronograph movement. With its sleek lines, accurate timekeeping, and blistering performance, the Rolex Yacht-Master 40 is a tool watch built to last. You can trust that it keeps up with your relentless pace. It’s no wonder that this beautifully-crafted timepiece has been a favorite of professionals, businessmen, and sailors for years.

Investment Potential

Due to the brand’s longstanding history and notable name, Rolex watches are currently worth a significant amount on the vintage market, making buying a used model or original model watch a sound investment. Also, due to their high price tag, they hold value whenever you want to resell them in the future.

What To Look For When Buying a Rolex Yacht-Master 40 Watch

The Rolex Yacht-Master 40 is essentially a luxury yacht on your wrist. It’s bold, powerful, and gives you the feeling of freedom. However, there are a few things that you need to know before you purchase this hefty piece. If you take the time to check out these few tips, it will make it much easier for you to get one of these watches and enjoy the lifestyle that comes with it.

Examine the Condition of the Watch

Like most things in life, the condition affects the value of a Rolex watch. It’s especially important if you’re looking to purchase a pre-owned Rolex Yacht-Master 40. Mostly, you’ll look for one in excellent condition and priced below the high end of reasonable. However, these watches are rare and are almost impossible to find.

Nevertheless, when you buy, thoroughly check the condition of the watch, such as:

• The bezel, crystal, or bracelet should be free from deep scratches.
• There should be no stains, marks, or corrosion on the dial and markers.
• The links in the bracelet should be snug and not loose or stretched out.

Additionally, watch boxes and maintenance documentation come with new YM 40 watches. However, if a pre-owned watch doesn’t have paperwork that comes with it, the only way to ensure authenticity is to be very knowledgeable about the model. In addition, reputable sources like Bob’s Watches offer at least a year’s warranty.

Be Alert on Spotting Fakes

Yacht-Master 40 (or Rolex watches, in general) are a good business due to their quality and price. That’s why many people get the opportunity to sell imitations to make money.

With that in mind, here are tips on what to look for when trying to spot the real deal:

• The watch’s weight speaks of the quality materials used to create it. Thus, if it’s a light one, it means they’re made of low-quality materials.
• The Rolex Yacht-Master 40 is remarkable, so its second-hand movement is smooth and not choppy.
• It has a completely clear and scratch-resistant sapphire crystal. A watch with a tinted or chipped crystal is probably fake.
• Genuine YM 40 watches are made of precious metals. They feature a variety of different styles, but they all have a silky-smooth finish to them. Fakes have a dull look.
• The luminous markers should be visible in the dark, and the dial should be free of scratches or imperfections.
• Ensure that the bezel is moving smoothly without catching or clicking.

Moreover, do your research and employ all the tactics you can to ensure you’re getting a genuine product. Any trace of imperfection that isn’t normal wear and tear should make you question the authenticity of the piece.

Shop from a Certified Seller

To save yourself from dealing with fake YM 40, always buy from a certified dealer. They are typically well-established businesses that have been selling fine timepieces for decades. They should be registered with their local government and have the proper tax paperwork available upon request.

A reputable watch dealer will have a professional staff, carry a large stock of new or pre-owned watches, have a warranty policy, and never be pushy or try to rush you into making a purchase. They should be familiar with the process and will keep you informed every step of the way. If you ever find yourself feeling uncomfortable or uncertain of the seller’s intentions, leave immediately.

How Much Does a Rolex Yacht-Master 40 Cost?

Rolex Yacht-Master 40 watches are a classic, timeless design that can be worn by anyone. While most people will say it’s pricey, you might be surprised to learn that they’re relatively affordable, especially compared to other Rolex watches. Depending on the model, age, and materials used, you can expect to pay between $5k and $50k for a new or used Rolex Yacht-Master 40.

Shop Our Rolex Yacht-Master 40 Collection

Without a doubt, the Rolex Yacht-Master 40 is one of the most versatile watches in the brand’s lineup. If you’re interested in buying a new or pre-owned YM 40, we’re sure that you will find the perfect one in our Rolex Yacht-Master 40 collection. We pride ourselves on our selection of high-quality, durable Men’s Rolex watches you can wear everyday.

About Paul Altieri

Paul Altieri is a vintage and pre-owned Rolex specialist, entrepreneur, and the founder and CEO of BobsWatches.com. - the largest and most trusted name in luxury watches. He is widely considered a pioneer in the industry for bringing transparency and innovation to a once-considered stagnant industry. His experience spans over 35 years and he has been published in numerous publications including Forbes, The NY Times, WatchPro, and Fortune Magazine. Paul is committed to staying up-to-date with the latest research and developments in the watch industry and e-commerce, and regularly engages with other professionals in the industry. He is a member of the IWJG, the AWCI and a graduate of the GIA. Alongside running the premier retailer of pre-owned Rolex watches, Paul is a prominent Rolex watch collector himself amassing one of the largest private collections of rare timepieces. In an interview with the WSJ lifestyle/fashion editor Christina Binkley, Paul opened his vault to display his extensive collection of vintage Rolex Submariners and Daytonas. Paul Altieri is a trusted and recognized authority in the watch industry with a proven track record of expertise, professionalism, and commitment to excellence.

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Yacht-Master

THE WATCH OF THE OPEN SEAS

The Oyster Perpetual Yacht-Master, the emblematic nautical watch, embodies the privileged ties between Rolex and the world of sailing that stretch back to the 1950s.

Launched in 1992, the Yacht-Master was designed specifically for navigators and skippers. Embodying the rich heritage that has bound Rolex and the world of sailing since the 1950s, this Professional-category watch provides a perfect blend of functionality and nautical style, making it equally at home on and off the water.

AN IMMEDIATELY RECOGNIZABLE BEZEL

The Yacht-Master is easily recognized by its bidirectional rotatable 60-minute graduated bezel made entirely from precious metal (gold or platinum) or fitted with a Cerachrom insert in high-technology ceramic. The raised polished graduations and numerals stand out clearly against a matt background. This characteristic and functional bezel – which enables the wearer to read time intervals, for example, the sailing time between two buoys – plays a full part in creating the unique visual identity of the watch. The bezel can be turned with ease thanks to its knurled edge, which offers excellent grip.

CHROMALIGHT DISPLAY

The Yacht-Master offers great legibility in all circumstances, even in the dark, thanks to its Chromalight display: the large hour markers and broad hands are filled or coated with a luminescent material emitting a long-lasting blue glow – for up to two times longer than traditional phosphorescent materials .

THE YACHT-MASTER, SUPERLATIVE CHRONOMETER CERTIFIED

Like all Rolex watches, the Yacht-Master is covered by the Superlative Chronometer certification redefined by Rolex in 2015. This exclusive designation attests that every watch leaving the brand’s workshops has successfully undergone a series of tests conducted by Rolex in its own laboratories and according to its own criteria. These certification tests apply to the fully assembled watch, after casing the movement, guaranteeing superlative performance on the wrist in terms of precision, power reserve, waterproofness and self-winding. The Superlative Chronometer status is symbolized by the green seal that comes with every Rolex watch and is coupled with an international five-year guarantee.

The precision of every movement – officially certified as a chronometer by the Swiss Official Chronometer Testing Institute (COSC) – is tested a second time by Rolex after being cased, to ensure that it meets criteria that are far stricter than those of the official certification. The precision of a Rolex Superlative Chronometer is of the order of −2/+2 seconds per day – the rate deviation tolerated by the brand for a finished watch is significantly smaller than that accepted by COSC for official certification of the movement alone.

The Superlative Chronometer certification testing is carried out after casing using state-of-the-art equipment specially developed by Rolex and according to an exclusive protocol that simulates the conditions in which a watch is actually worn and more closely represents real-life experience. The entirely automated series of tests also checks the waterproofness, the self-winding capacity and the power reserve of 100 per cent of Rolex watches. These tests systematically complement the qualification testing during development and production, in order to ensure the watches’ reliability, robustness, and resistance to strong magnetic fields and to shocks.

THE OYSTER CASE, SYMBOL OF WATERPROOFNESS

The Yacht-Master’s Oyster case, 37 mm, 40 mm, or 42 mm in diameter and guaranteed waterproof to a depth of 100 metres (330 feet), is a paragon of robustness and reliability. The middle case is crafted from a solid block of Oystersteel, RLX titanium or 18 ct gold. The case back, edged with fine fluting, is hermetically screwed down with a special tool that allows only certified Rolex watchmakers to access the movement. The Triplock winding crown – fitted with a triple waterproofness system – screws down securely against the case. It is protected by an integral crown guard. The crystal, with a Cyclops lens at 3 o’clock for easy reading of the date, is made of virtually scratchproof sapphire and benefits from an anti-reflective coating. The waterproof Oyster case provides optimal protection for the movement it houses.

PERPETUAL CALIBRES 2236 AND 3235

Yacht-Master models are equipped with calibre 2236 (Yacht-Master 37) or calibre 3235 (Yacht-Master 40 and Yacht-Master 42), self-winding mechanical movements entirely developed and manufactured by Rolex. Consummate demonstrations of technology, these movements carry a number of patents. They offer outstanding performance, particularly in terms of precision, power reserve, convenience and reliability.

Calibre 2236 is fitted with the patented Syloxi hairspring in silicon, manufactured by the brand. In addition to resisting strong magnetic fields, this hairspring offers great stability in the face of temperature variations as well as high resistance to shocks. Its geometry, which is also patented, ensures the movement’s regularity in any position. Calibre 2236 includes a paramagnetic nickel-phosphorus escape wheel.

Calibre 3235 incorporates the patented Chronergy escapement, made of nickel-phosphorus, which combines high energy efficiency with great dependability and is also resistant to strong magnetic fields. This movement is fitted with the blue Parachrom hairspring, manufactured by Rolex in a paramagnetic alloy. In addition to resisting strong magnetic fields, this hairspring offers great stability in the face of temperature variations as well as high resistance to shocks. It is equipped with a Rolex overcoil, ensuring the calibre’s regularity in any position.

The oscillator of these two calibres has a balance wheel with variable inertia regulated extremely precisely via gold Microstella nuts. It is held firmly in place by a height-adjustable traversing bridge enabling very stable positioning to increase shock resistance. The oscillator is also mounted on the Rolex-designed, patented high-performance Paraflex shock absorbers, further enhancing the movements’ shock resistance.

Calibre 2236 and calibre 3235 are equipped with a self-winding system via a Perpetual rotor, which ensures continuous winding of the mainspring by harnessing the movements of the wrist to provide constant energy. Calibre 2236 offers a power reserve of approximately 55 hours, while the power reserve of calibre 3235 extends to approximately 70 hours thanks to its barrel architecture and the escapement’s superior efficiency; moreover, from 2023, its oscillating weight is fitted with an optimized ball bearing.

The Yacht-Master’s movements will be seen only by certified Rolex watchmakers, yet they are beautifully finished and decorated in keeping with the brand’s uncompromising quality standards.

BRACELET AND CLASP: SECURE AND COMFORTABLE

The Rolesium versions (combining Oystersteel and platinum) and the Everose Rolesor versions (combining Oystersteel and Everose gold) of the Yacht-Master 37 and the Yacht-Master 40, as well as the Yacht-Master 42 in RLX titanium, are fitted on a three-piece link Oyster bracelet, equipped with the Easylink comfort extension link. This system, developed by Rolex, allows the wearer to easily increase the bracelet length by approximately 5 mm, for additional comfort in any circumstance. On the Yacht-Master 42 in RLX titanium, the bracelet includes ceramic inserts – designed by Rolex and patented – inside the links to enhance its flexibility and longevity.

The Yacht-Master 37 and Yacht-Master 40 in 18 ct Everose gold, as well as the Yacht-Master 42 in 18 ct yellow or white gold, are fitted on an Oysterflex bracelet equipped with the Rolex Glidelock extension system. This innovative bracelet, developed by Rolex and patented, singularly combines the robustness and reliability of a metal bracelet with the suppleness, comfort and aesthetics of an elastomer strap. It is composed of two flexible, curved metal blades – one for each bracelet section – overmoulded with high-performance black elastomer. Developed by the brand and patented, the Rolex Glidelock is an inventive mechanism comprising a rack located under the clasp cover that enables fine adjustment of the bracelet length, without the use of tools. The Rolex Glidelock on the Oysterflex bracelet has six notches of approximately 2.5 mm each, allowing the bracelet length to be adjusted easily, up to some 15 mm.

The Oyster and Oysterflex bracelets on the Yacht Master models are equipped with an Oysterlock safety clasp, designed by Rolex and patented, which prevents accidental opening.

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Sea-Dweller

Russia’s BN800 fast reactor fully fuelled with mox

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Beloyarsk 4 was connected to the grid and resumed electricity production after the completing its latest regular maintenance and refuelling outage. It was refuelled with mox fuel assemblies (FAs) produced at the Mining and Chemical Combine (MCC) in Zheleznogorsk, Krasnoyarsk Territory). Unlike the enriched uranium FAs traditionally used in NPPs, the raw materials for the production of mox fuel pellets includes plutonium oxide obtained during the processing of used fuel from conventional VVER reactors alongside depleted uranium oxide, obtained by defluorination of depleted uranium hexafluoride (DUHF – “tails" from enrichment production).

The first serial mox-FAs were loaded into the BN-800 core in January 2020. The first complete refuelling of the BN-800 with mox fuel took place in January 2021, and then, over the next two refuellings, all fuel assemblies were gradually replaced with innovative mox assemblies.

Other important work performed during the outage of unit 4 included overhaul of the main circulation pump with the replacement of the removable parts, maintenance and repair of pumps, heat exchangers, steam generators and a turbogenerator. Also, the operational quality control of metal and welded joints of pipelines was carried out as well as tests of the system for monitoring the tightness of shells using a metrological assembly.

“Today, Beloyarsk NPP is one of the flagships bringing the Russian nuclear industry closer to a new technological platform based on a closed nuclear fuel cycle,” said Beloyarsk NPP Director Ivan Sidorov. “The use of mox fuel will make it possible to increase the fuel base of the nuclear power industry tenfold. And most importantly, in the BN-800 reactor, after appropriate processing, used nuclear fuel from other NPPs can be recycled.”

Alexander Ugryumov, Senior Vice President for Scientific and Technical Activities at TVEL said completing conversion of BN-800 to mox fuel is a long-awaited event for the nuclear industry. “For the first time in the history of the Russian nuclear power industry, we will be able to operate a fast neutron reactor with a full load of uranium-plutonium fuel and a closed nuclear fuel cycle. This is exactly the milestone for which the BN-800 was originally designed, a unique nuclear power unit supported by automated fuel production at the Mining and Chemical Combine. Advanced technologies for recycling nuclear materials will significantly expand the raw material base of nuclear energy by processing irradiated fuel instead of storing it, and it will also reduce the amount of waste generated.”  

Industrial fabrication of mox fuel began at the end of 2018 at the MCC. To create this unique production, broad industry cooperation was organised under the coordination and scientific leadership of TVEL, which also acts as the supplier of mox FAs for the Beloyarsk NPP. Initially, during the start-up of the BN-800 reactor, a hybrid core was installed, partly equipped with uranium fuel produced by Mashinostroitelny Zavod in Elektrostal (Moscow Region), and partly with experimental mox fuel assemblies manufactured at the Research Institute of Atomic Reactors in Dimitrovgrad, Ulyanovsk region.

Image: MOX fuel assemblies are loaded into the BN-800 fast reactor core at Beloyarsk NPP (courtesy of TVEL)

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Geographic coordinates of Elektrostal, Moscow Oblast, Russia

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Coordinates of Elektrostal in decimal degrees

Coordinates of elektrostal in degrees and decimal minutes, utm coordinates of elektrostal, geographic coordinate systems.

WGS 84 coordinate reference system is the latest revision of the World Geodetic System, which is used in mapping and navigation, including GPS satellite navigation system (the Global Positioning System).

Geographic coordinates (latitude and longitude) define a position on the Earth’s surface. Coordinates are angular units. The canonical form of latitude and longitude representation uses degrees (°), minutes (′), and seconds (″). GPS systems widely use coordinates in degrees and decimal minutes, or in decimal degrees.

Latitude varies from −90° to 90°. The latitude of the Equator is 0°; the latitude of the South Pole is −90°; the latitude of the North Pole is 90°. Positive latitude values correspond to the geographic locations north of the Equator (abbrev. N). Negative latitude values correspond to the geographic locations south of the Equator (abbrev. S).

Longitude is counted from the prime meridian ( IERS Reference Meridian for WGS 84) and varies from −180° to 180°. Positive longitude values correspond to the geographic locations east of the prime meridian (abbrev. E). Negative longitude values correspond to the geographic locations west of the prime meridian (abbrev. W).

UTM or Universal Transverse Mercator coordinate system divides the Earth’s surface into 60 longitudinal zones. The coordinates of a location within each zone are defined as a planar coordinate pair related to the intersection of the equator and the zone’s central meridian, and measured in meters.

Elevation above sea level is a measure of a geographic location’s height. We are using the global digital elevation model GTOPO30 .

Elektrostal , Moscow Oblast, Russia